Study: Set version to 0.2.0.

src/Model/Study.py

@@ -44,7 +44,7 @@ class Study(SQLModel):
 
     def __init__(self, filename=None, init_new=True):
         # Metadata
-        self._version = "0.1.7"
+        self._version = "0.2.0"
         self.creation_date = datetime.now()
         self.last_modification_date = datetime.now()
         self.last_save_date = datetime.now()